Pump



July 46 1926.

P. R.v FINCH PUMP Filed Dec. gv. i923 2 Sheets-Sheet 1 f ETD* ICE PAULR. EI'NCH, or? DEsMomnsiowA; n'ssenoa enorm-HALF 'ro ALVA'H 'awr-naief 'f OFDEs1vIYo11\TKE sV,1owA, ,y

y Y i .PMP, y y Appneatiiminea Decmbergm', 1923;;-` seria1 Nef esami l '5 l l The, object of thisinventionfis to provided'number7 one at each end ofthe"shaft,k I an improved constriictionfor a rotary pump. cylmdrlcaljimpeller 21,-Jof less ,diameterfthanfy Y A further object Aofthis invention -1s to the cylindrical"1-I chamber 11,)-is mountedinr j 1 provide an improved-means for separating said chamber and is formed with-'a centrab' f a pump chamber into tWocompartments, longitudinal bore 22 through i which-'said `80 including a hingedplate having sliding con; shaft extends loosely. Formedon o-rffifziecvltoy nections withj-an impeller and engaging ia tlie.shaftk.17 are one. or' more eccentrics'ff v wall of the chamber. y v j V fitting the bore ofthe impeller 21, and said f )A further object of thisv inventionisfto eccentrics serve to hold;` theimpeller ecce'n.n 10 provide Vefficient means, so arranged. as "to trically of the ,chamber 11 `and toV4 give it 65 prevent leakage, orbridgingrthespace be-v :circular y*orbital `rnovementlY.therein,:in 'oon-' Q4 tween a movablev impeller ,and afwall of a, taotlwith the chamberwal'ls, when the 'shaftl Y chamber, for 'dividing said chamber int is v'r'otated.-j ,Thepccentricsmay bev of any, p twor separate compartments. desired number andillanydesiredfportion4 My invention consists in the construction, lofthe length 'ofthe borefofA the impeller, 70` j arrangement and combination: of elements oneonlyofsaid members vbeingy shown',in hereinafter set; forth, pointed Yout infmy Figure 1.V Yfformed onj'or fixed to the iin-f, claims andillustrated by theaccompanying peller 21jatonepoint'5of itsjrpeiiphery, andf drawing, in whichyextending radially therefrom, is ablade 24T -Figure 1 isan end view, with one end which'rprojectsfthrough:they-passage v1 3Hand75 plateA removed, showing one form rotary into vthe chamber 11'. j" plat`e525 extends pump-embodyingmy improvements," Y y longitudinallyfof'the"outer portionv ofthe [Figures Zand 3 arevsimilarfvie'ws showchamber 12,and1in4 this instanceisarranged. i ingV Vdierent forms `of rotary pumps em? centrally/"thereof andopposite thepassjag'e y 25 bodying my improvements. v l i 1,3 andblade or vwing 247C. The plate'has 8O f Figure 4 lisr a. side elevationof the pump. one, marginincsoillatingc ontact with fthe 'n shown in Figure 1. l inner surfaoeofthe wall 'ofthe chamber V12sv Figure is a 'detail,view, partly in section, and in l this instance such: niargin of the,

vat right angles to Figure :1, showing the plateis' ormedonvan arcjand; extends ,with-,

30. hinged plateV and a portionV of theV impeller in vannarcuate*groove or .ooncavity in` said '85 .ff j

blade to whichit is slidingly connected. wall,1the.better to prevent Ifluid leakage` bey Figure 6 is a detail Vview of the l'members tween saidmembers The-plate 25 is formed. I

shown in Figure 5, detached.. i

In the construction of he device as shownl Vnions are journaled inbearings A'l1-9 formed in' Withtrunnion's 26' on its ends, "whicht'runf n' *i in Figures 1, 4,5and 6thenumeral1`Odesigthe end walls ltand 1510i vthe;'housing'.,SJVl

nates lgenerallyja casing formed witha Plates 27, 28. are; mounted. onfopposite sides substantially cylindrical chamber 11 andV `a oi: and secured rigidly. to the lowerportion chamber 12 communicating therewith by` 'of the impeller,blade2aV byvmeiansf of bolts-4 l means ora-passagel extendingfrom end 29.y The plates27, `28 lprojectbeyond the Y to end ofV said chambers As shown, the margin of the blade 24 and slidingly engage 951-" Vchamber-$12 isfatrthe base of the casing andi the partition plate 25. Preferably a num-.. the chamber 111is superposed relative there-l 'ber of shims such as SOare-originally mount-V to, buty the position may be4 reversed or the'Vv edbetweenfthe bladef24fand plates @27 ,28, pump placed inanyy suitable position Y for opv which :may be removedrfromtime'to timeas easing are-fclosedby of 'endplates1li,y the plates 27, QSand'partition.plate 25 and 15 V held inplace bynmeans oflboltsextendf prevent ''f1uid leakage, therebe'tweer'i.A y vThe' ing'fthrough holes .-fthe'rein pand through blade 24C', partitionplate]y 25 andfclamping eration. The endsof thechamber'sof the wearoccurs tomaintain tight fit between 1001y registering'holesll-inthewallfof the casa. plates 27,28Ntogethervfor'm a partition di, Y 50 ing. A'shaft 17 is A'nlountedlongitudinally vidingthe chamber 12'longitudinallyv intofl05 .and axially oftthe; cylindrical chamber 11, twocompartmentsf and said members ex--vl' is journaled; forjrotationfinbea-rings V18 inV tendfrom end toendjof said, chamber and,v y the ends -plates 14g-15, projects therefrom liavea working Contact with' the `e'nd,walls andvisfprov'ided with one vorfmore beltv or oflr ythe jhousing, suchthaty comparativelyv filyf'vvheels19,20, in this `,instance two in littlefleakage ofjfl'uidmay occur, loetviieen;lm fl V them. 'The walls of, the casing are .t'ormedi with ports l31, 32 opening to the chamber 12 on opposite sides of the partition therein, and said ports are provided with suitable connections (not shown) and so arranged as to be used as inlet and exhaust ports, one answering for the inlet and the other forY the exhaust of fluid from the pump.

" In ractical use the uin may be driven P P P Y by any desiredpmeans, and be employed c either as 'a compressor or an exhaust pump.

As the "shaft 17 is rota-ted the cams23 thereoncause 'the cylindrical lirnpeller to Arevolve e iny its orbit", having Va moving I'Contact at changingpoints of its periphery with the periphery o-t the ycylindrical chamber Y11,

and such travel may bein either direction.l

As' the impeller moves in 'the mannerfjdescribed the blade 24 is caused to osci'llate vertically and laterally, 'and lthe passage 13 is'ot suliicient widthV to permit such travel Vwith-out vcont-act of the blade with'rits margins. The movement or" the Vblade causes aV corresponding movement lot the clamping plates '27, 28, which `slide lon the partition plate. 25, 'causing it lto rock on its trunnions7 at all times maintaining a contact at its lower margin. withY thel bottom of the cham- Y bier 12.2 Thus the two 'compartments ot the ychamber arekept separate, and Afluid in one o'fisardcompartments is 'drawn by the movement of the rotary impeller into the cylin- Vplaced wicks or masses'ot absorbent material ,used as vehicle. tor vlubricating material and .adapted to l lubricate land lprevent friction .particularly between the ends of thel impeller and the casing walls.v

yinvention Aresides particularly in lthe peculiar -form and arrangement ofthe rock- Ving partition between Vthe rotary Vimpeller and the opposite wall of the casing through the mediumV of the'partition plate 25, and such constructionmaybe employedzin many forms of rotary pump.

' In Figure I`2, I have shown my improvement `applied to 'a' form vot pump adapted to be constructed `of ysheet metal, ay sheet 34 is bent and curved to thejdesired shape/to produce 'the chambers ofthe pump casing. The vsheet or wall 34 is formed with flanges 34` a'pertur'ed at '16 to receivebolts by which it is bolted to the end plates ofthe casing. The `sheet 34 is so ormedxas to produce a substantially cylindrical chamber 11 and anovate chamber 12' communicating therewith through a. passage 13, formed by ter-y minatingone margin of the sheet opposite a wall common to 'saidchambers.` l .The sha-ft V17 with `its eccentrics 23 is similar to what has been described, and the impeller is yformed-cttw@ concentric sheets 21 suitably ,connected, the inner sheet receiving contact of the cams 23 and the outer havjing' oscillating contact with the periphery of the cylindrical chamber 11. One portion' ofthe euter'fs'he'et 21 is extended beyond the periphery thereof in substantially tangential relation to form an impeller blade 24 projectingjthrough thejpalssage 13 into the chamber 12. 'A rocking partition plate 25, exactly. like those previously described, is formed with trunnions 26 journaled inthe end walls of the casing, said partition plate having oscillatingcontact at one long margin with thewall oft the' Y chamber 12. The impeller blade 24 eX- tends ypast the opposite margin of the plate 25, and in sliding contact therewith, and

a'clampingplate 27 lis mounted parallel thereto, and in sliding Contact with the able partition thus formed, and in this in-" stance saidV ports are formed in one end wall or plate 14 ot the housing.

Iny Figure 3 is shown a `form ol pump equipped with my improvement, lin which a substantially cylindrical casing 35 is formed with a single cylindrical chamber 36 in which a shaft 37 is arranged raxially `Aand :is provided with cams 38. Y n peller 39 is mounted in the chamber and vis formed with a cylindrical bore 40receiving the shaft and engaged by the cams, -and by said cams the impeller is held in eccentric 'position within the chamber and caused to travel in a circularv orbit in contact with the wall ci the chamber. A partition vplate 41 extends longitudinally of the Vchamber and is formed with trunnions 42 journaled 'in 'the ends thereof, and one margin of said plate A cylindrical .im-

extends within aV concaved channel 43 eX- V tending longitudinally ot the wall l`of theV chamber. 'At one point in vits ,peripheryV the impeller y39 yis formed with a "longitudinal dovetailed grooveV 44 `within which is snugly mounted an yimpeller blade or wingV 45, projecting at one margin from 4fsa-iy groove andtormedwitha longitudinal channel or shdeseat 46"hav1ng"sl1ding 'engage- 'ment with one marginal portion ofithe partition plate 41. Near the movable partition vthus formed, and-on oppositey sides thereef,

able distance Iin fsaid impeller,;andthe "inner margin of the partition plate 41 may'even' project somewhat within the periphery 4of the impeller. as shown. l Y In actual practice itmaybe desirableto leave a very slight clearance between the periphery of the impeller andthe wall of the chamberl to prevent noise in use, but said members are in substantial contact. c

I claim as my invention-va l. A pump comprising a cylindrical chamber, a second chamber communicating with the iirst and having intake and yexhaust ports, an eccentrically movable cylindrical impeller within the said cylindrical chamber Ahaving contact at one point of its peripheryV with'the wallof the'latter,f'a blade projecting from the periphery of the impeller and extended into the second chamber, a partition plate mountedrfor oscillation'in the.` second chamberV and having one margin extended into oscillatingcontact with a wall Athereof, and sliding connections between said '1., impeller blade and partition plate, said impeller blade,rpartition plate and sliding connections Yconstituting a movable partition across Asaid second chamber between the intake and exhaust ports.V

2., Apump comprising acylindrical chaml' ber, a second chamber communicating with `the first and having intakeand exhaust ports, "anpeccentrically movable .cylindrical impeller within the cylindrical'chamber having traveling contact'at one point of its pew rlpheryrwith the wall `of the latter, a blade projecting from the periphery ofthe im- Vpeller and extended into the secon-d chamber, a' partition plate having trunnions at'its ends journaled inthe walls of the second chamber and rhaving one margin in movable Contact with a wall of said chamber opposite the cylindrical chamber, `and sliding connections vbetweensaid impeller yblade and partition plate, wherebyy a movable partition is provided across 'the second chambervbef tween the .intake Vandvexhaust ports.

3. A pump comprising asubstantially` cylindrical chamber', a second chamberlcom-l inuni'cating withv the lirst and havingy intake y exhaust ports, an eccentrically movable v chamber having :traveling Contact, with thecylindrical impeller-within the cylindrical` wall of the latter, a blade projecting from the .periphery of the impeller and extended into the second chamber', 'a partition plateY .i

having'trunnions at its ends journaled in the Y Y; walls of Vthe second chamber and having'onel Vmargin in movable contactwitha Wallv of said chamber opposite thecylindrical chamber, anda plate fixed togsaid impeller blade and having sliding contact vwith said partistantially i cylindrical impeller within the Vcylindrical chamber having travelin 'con` 6o f tion plate, whereby a movable and extensible tact withvthewall ofthe latter, a bla e pro- -jecting from the impeller and extended into the second chamber, a partition plate mounted forrrocking movement in the sec. ond ,chamber and having Vone margin.

chamber between the -intake' and exhaust ports, kand a plate fixed to said bladeand having the length of: said `partition plate;

sliding contact with` and throughout Y 80 Y u i roundedjand in contactwitfh a wall offsaid Y 5. In a rotary ypump having a casing and an impeller mounted for orbital travel there- Vin, said casing being formed with intake and exhaustV ports, the y combination With` said casing and `nnpeller, of afpartitionf plate mounted for rocking movement in said casing and having one margin'i'n contact -V with a wall thereof 'between the intake and A'exhaust ports, and sliding connections between said impeller and partition plate whereby a movable partition is formed betweensaid intake'and exhaustports. Y

l SignedA at Desy Moines, in the countyy lof cember, 1923.1y i ,f

'- PAUL B FINCH;

Polk and VState of'Iowa, this;V V19thdayxof De- 

